Exercise

Submission consists of

• A commit of your repository. Tag the commit the "Exercise v.1"
• If you resubmit your solution, tag the new commit with "Exercise v.x"

If your project is on s3k

Implement fork/exec. The exercise consists of the following tasks

• Implement two small programs (A and B) that are linked in the same address space
• Modify the FileSystem example to boot process A
• Copy the binary of B to the disk image
• Allow A to send a message to the filesystem with the path to executable B
• Change the filesystem to handle the message from A and load an executable in place of the current one.

If your project is on Minix

The goal of this exercise is to implement a minimal ASLR for Minix (start from branch aslr-demo).

The exercise consists of three tasks:

• Write a program in /usr/games/overflow that has a buffer overflow and demonstrate the vulnerability (or use the program in /usr/games/demo01 in branch aslr-demo)
• Modify Minix (Kernel, user lib, services, etc) to randomize position of stack and heap of processes. Each process should be randomized differently.
• Demonstrate that ASLR counters the attack

If your project is on something else

If your project target a different open source software you must agree with Roberto for a different assignment. The goal of the assignment is to demonstrate that you can navigate the code of the project and apply some modifications.